Self-cleaning bag for vacuum-cleaners.



E.=L. B. ZIMMER. SELF CLEANING BAG FOR VACUUM CLEANERS.

APPLICATION FILED JUNE 2.1915.

INVENTOR ,zfiwesz ZZZ 77297 WITN SSES:

BY fZfdM STATE PATENT @FFQE ERNEST L. B. ZIMIVIER, OF OAKLAND, CALIFORNIA, ASSIGNOB, OF SEVENTY-FO'UR ONE- HUNDREDTHS TO JOHN WESLEY HURLEY, OF PORTLAND, OREGON.

SELF-CLEANING BAG FOR VACUUM-CLEANERS.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed June 2, 1915. Serial No. 81,756.

Toall whom it may concern:

Be it knownthat I, ERNEST L. B. ZIMMER, a citizen of the United States, residing at Oakland, in .the county of Alameda and State of California, have invented new and useful Improvements in Self-Cleaning Bags for Vacuum-Cleaners, of which the following is a specification.

This invention relates to improvements in any time.

Another object of the invention is to place a perforated weighted bottom interiorly ofthe'bag to keep it stretched and to place a plurality of flexible members interiorly of the bag which are connected at their upper ends with the bag support and at their lower ends with the perforated bottom; and to provide a striking head with which said members engage when the bag is contracted by the suction stroke of the connected pump.

Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter -more fully described and claimed, having reference to the accompanying drawings, in' which Figure 1 is a perspective view of the bag .frame. Fig. 2 is a side elevation showing the bag mounted in the dust collecting tank. Fig. 3 is an enlarged sectional view of the lower end of pipe 10.

A indicates a head which forms a closure for the dust collecting receptacle or tank, such as indicated at B. Formed on the lower side of said head is an annular, downwardly projecting flange 2, on the lower edge of which is formed a plurality of perforated lugs 3. Pivotallymounted and extending downwardly from said lugs is a plurality of flexible wire rods 4, and sus' pended from the lower ends of said rods is *a perforated weighted bottom section 5.

The upper face of said bottom is provided with a plurality of perforated lugs 6, similar to the lugs 3, and the rods are pivotally secured in same. The bottom section 5 is thus suspended from the several rods 4 and is free to swing in any direction.

Formed on each wire rod 4, intermediate of the ends, is a coiled section 7. This is provided for the purpose of producing greater flexibility and also for the purpose of transmitting the greatest vibratory movement possible to the dust bag 8 which is mounted eXteriorly of the bottom section 5 and rods 4; the upper end of the bag being slipped over'the exterior face of flange 2 and being secured thereto by a clamp ring of suitable construction, such as indicated at 9.

Centrally secured in the head 2 and extending downwardly a suitable distance between the rods 4 is a tube 10, on the lower end of which is mounted a collar 11 which will hereinafter be known as the striking cam. The lower end of the tube is provided with a plurality of openings, such as indicated at 12, and these, together with the lower end of the tube, are covered with a finely woven wire fabric or screen material, such as indicated at 13.

In operation, it is only necessary to insert the bag frame as a whole into the tank indicated at B and to secure the head on the tank by means of screws or the like to form an airtight connection at this point. Pipe 14 is then connected with a vacuum pump (not here shown) and as this pipe connects with the tube 10 it will be seen that a vacuum will be produced interiorly of the bag and tank B.

15 indicates a pipe to which the suction hose and cleaning apparatus may be attached and 16 a suitable form of opening through which the dust may be removed from the tank. The moment suction is applied to pipe 14- it will immediately be transmitted through central tube 10 and the screened openings formed in the lower end thereof. A vacuum will thus be produced within the bag and this is in turn transmitted to the interior of tank 13 and pipe 12. The dust entering through the suction hose with the incoming air, when the apparatus is being used, will thus enter tank B and will consequently have a tendency to collect on the outer face of the bag. Any accumula- 4. The pulsations transmitted from the pump will have a tendency to continuously contract and expand the surface of the bag, together with the flexible rods 4, in a radial direction inwardly and outwardly. The surface of the bag is thus constantly vibrated radially and also longitudinally, as the inward movement of the rods has a tendency to lift the weighted bottom section 5 upwardly. The bottom section 5 is thus constantly jumping up and down, thereby transmitting a longitudinal shaking motion to the bag in unison with the radial vibration transmitted through rods 4. The inward movement of the rods is limited by the striking head '11, as the coiled sections 7 engage same when contracted by the suction stroke of the pump. The surface of the bag is thus vibrated on the inward movement of the rods when theseengage the striking head and the also vibrated when the wire rods are relaxed on their outward movement.

It sometimes happens that the canvas bag other causes. The dust will then enter directly through pipe 10 into the pump with aconsequent ruinous action. This danger is, however, eliminated in the present instance by providing the screened openings 12.

A dust bag constructed and mounted in the manner here shown is simple, durable, and highly eflicient in action. It not only presents a large filtering surface with a subsequent reduction of pull on the pump, but being automatically vibrated, both radially and longitudinally, it is absolutely selfcleaning in action, thus reducing a pull on the pump to a minimum.

The materials and finish of the several parts of the device are such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In an apparatus of the class described, a bag frame comprising a head, a bottom section, a plurality of flexible suspension members supporting the bottom section, and a dust bag secured exteriorly of the frame forming a covering for the flexible suspension members and bottom section.

2. In an apparatus of the class described, a bag frame comprising a head, a bottom section, a plurality of flexible suspension members supporting the bottom section with relation to the head, and a dust bag secured to the head and forming an exterior covering for the flexible suspension'members and bottom section.

In an apparatus of the class described, a bag frame comprising a head, a plurality of wires pivotally connected at their upper ends with the head, a bottom section pivotwires,

surface of the bag is' Wlll crack or rip due to wear and tear orally suspended from the lower ends'of said and a dust bag secured tothe head and forming an exterior covering for the wires and bottom section. v

4. In an apparatus of the class described, a bag frame comprising a head, a plurality of wires pivotally connected at their upper ends with the head, a bottom section pivot-. ally suspended from the lower ends of said Wires, a coil section formed oneach wire intermediate of its ends, and a dust bag secured to the head. and forming an exterior covering for the Wires and bottom'section.

5. In an apparatus of the class described, a bag frame comprising a head; a bottom section, a plurality of flexible suspension members supporting the bottom section with relation to the head, a dust bag secured to the head and forming an exterior covering for the flexible suspension members and bottom section, and a striking head centrally disposed interiorly of the flexible suspension members and bag with which the flexible suspension members engage when they are contracted by suction.

In an apparatus of the class described,

a bag frame comprising a head, a plurality of wires pivotally connected at their upper ends with the head, a bottom section pivotally suspendedfrom the lower ends of said wires, a dust bag secured to the head and forming an exterior covering for the wires and bottom section, and a striking head centra'lly disposed interiorly of the wires and bag with which they engage when the bag and wires are contracted radially by suc. tion.

- 7 In an apparatus of the class described,- a bag frame comprising a head, a plurality of wires pivotally connected at their upper ends with the head, a bottom section pivotally suspended from the lower ends of said wires, a coil section formed on each wire intermediate of its ends, a dust bag secured to the head and forming an exterior coveringfor the wires and bottom section, and

a striking head centrally disposed between the coil sections.

8. In an apparatus of theclass described, a bag frame comprising a head, a bottom section, a plurality of flexible suspension members supporting. the bottom section with relation to the head, a dust bag secured to the head and forming an exterior covering for the flexible suspension members and bottom section, a tube centrally secured in the head and extending downwardly between the flexible suspension members, and a screen covering the end of said tube.

9. In an apparatus of the class described, a bag frame comprising a head, a bottom section, a plurality of flexible suspension members supporting the bottom section with relation to the head, a dust bag secured to the headand forming an exterior covering nwegrei for the flexible suspension members and bottom sectiom a tube centrally secured in the head and extending downwardly between the flexible suspension members, a screen covering the end of said tube and a striking head mounted on the tube.

10. In an apparatus of the class described, a bag frame comprising a head, a plurality of Wires pivotally' connected at their upper ends with the head, a bottom section pivotally suspended from the lower ends of said Wires, a coil section formed on each Wire intermediate of its ends, a dust begsecured to the head and forming an exterior covering for the wires and bottom section, a tube centrelly secured in the head end extending downwardly between the flexible suspension members, and a screen covering the end, of said tube. I

11. In an apparatus of the-class described a bag frame comprising e head, a plurality of Wires ivotelly connected at their upper ends with the head, a bottom section pivotally suspended from the lower ends said Wires, a coil section formed on each Wire intermediate of its ends, 9.- tlust secured to the head and forming an exterior covering for the Wires and bottom section e tube centrally secured in the head and extending" downwardly between the flexible suspension members, screen covering the end of tube, and a striking" heed mounted on the witnesses.

ERNEST L. Witnesses v S. PAGE, A E Geezer 

